Java socket read-write asynchronous detach

In Android development, socket-based communication must be non-blocking, thus requiring the asynchronous separation of reader and writer, and the need to monitor the status of the socket network,

Monitoring interface

Package Com.io.sockets;import Java.io.ioexception;import Java.net.socket;public interface socketstatuslistener{ public static final int status_open = 0x01<<0;public static final int status_close = 0x01<<1;public static fin Al int status_reset = 0x01<<2;public static final int status_pip_broken = 0x01<<3;public static final int STAT Us_unkown = 0x01<<4;public void onsocketstatuschanged (Socket socket,int status,ioexception e);}

Handler read and write processing control

package com.io.sockets;import java.io.ioexception;import java.net.socket;public   class sockethandler implements socketstatuslistener {private socket socket=null; Private readertask reader;private writertask writer;public sockethandler (Socket  SOCKET)  throws ioexception {this.socket = socket;this.socket.settcpnodelay (true); Reader = new readertask (socket); Writer = new writertask (socket); O Nsocketstatuschanged (socket, status_open, null);} /** * sendmessage: (Here is a word describing the effect of this method).  <br/> * todo (This method is described here for conditions  –  optional). <br/> */public  void sendmessage (string msg)  {writer.send (msg);} Public void listen (Boolean islisten) {Reader.startlistener (this);} Public void shutdown ()  {if (!socket.isclosed ()  &&socket.isconnected ()) {try { Writer.finish ();Reader.finish (); Socket.close ();}  catch  (ioexception e)  {e.printstacktrace () onsocketstatuschanged (socket, status_ CLOSE,&NBSP;E);} finally{reader = null;writer = null; SYSTEM.OUT.PRINTLN ("Socket connection is OFF!! ");}}} @Overridepublic  void onsocketstatuschanged (socket socket,int status, ioexception  e)  {switch  (status)  {case SocketStatusListener.STATUS_CLOSE:case  Socketstatuslistener.status_reset:case socketstatuslistener.status_pip_broken:shutdown (); Break;default: Break;}}}

Read task

package com.io.sockets;import java.io.bufferedreader;import java.io.ioexception;import  java.io.inputstreamreader;import java.net.socket;import java.net.socketexception;public   class readertask extends thread{private socketstatuslistener socketstatuslistener; private bufferedreader bufferedreader;private socket socket;private boolean  Listening;public readertask (Socket socket)  throws IOException{bufferedReader =  New bufferedreader (New inputstreamreader (Socket.getinputstream ())); this.socket = socket;} /** * finish: (Here is a word describing the effect of this method).  <br/> * todo (This method is described here for conditions  –  optional) .< br/> *  @throws  ioexception  * */public void finish ()  throws  ioexception{listening = false;interrupt (); if (bufferedreader!=null && socket! =null) {if (Socket.isinputshuTdown ()) {socket.shutdowninput ();} Bufferedreader.close ();}} /*  (non-javadoc)  *  @see  java.lang.runnable#run ()  */@Overridepublic  synchronized   void run ()  {while  (listening)  {string readstr = null;try { while ((Readstr=bufferedreader.readline ())!=null) {System.err.println ("[Server]:" +readstr);}}  catch  (ioexception e)  {listening = false;if (socketstatuslistener!=null) {int  status = parsesocketstatus (e); Socketstatuslistener.onsocketstatuschanged (Socket, status, &NBSP;E);} E.printstacktrace (); return;//the terminating thread continues to run, you can also use Continue}}}private int parsesocketstatus (IOException  e) {if (SocketException.class.isInstance (e)) {string msg = e.getlocalizedmessage (). Trim (); ("Connection reset". Equalsignorecase (msg)) {Return socketstatuslistener.status_reset;} Else if ("socket is closed". Equalsignorecase (msg)) {Return socketstatuslistenEr. Status_close;} Else if ("Broken pipe". Equalsignorecase (msg)) {Return socketstatuslistener.status_pip_broken;}} Return socketstatuslistener.status_unkown;} /** * listen: (Here is a word describing the effect of this method).  <br/> * todo (This method is described here for conditions  –  optional) .< Br/> * */public void startlistener (SOCKETSTATUSLISTENER&NBSP;SSL)  {listening  = true;this.socketstatuslistener = ssl;start ();}}

Write task

package com.io.sockets;import java.io.bufferedwriter;import java.io.ioexception;import  Java.io.outputstreamwriter;import java.net.socket;public  class writertask extends  Thread{private BufferedWriter bufferedWriter;private String msg = null; Private socket socket = null;public writertask (Socket socket)  throws  Ioexception {this.bufferedwriter = new bufferedwriter (New outputstreamwriter ( Socket.getoutputstream ())); this.socket = socket;} /** * finishtask: (Here is a word describing the effect of this method).  <br/> * todo (This method is described here for conditions  –  optional). <br/> *  @throws  ioexception  * */public void finish ()   Throws ioexception {if (bufferedwriter!=null && socket!=null) {if (! Socket.isoutputshutdown ()) {socket.shutdownoutput ();} Bufferedwriter.close ();}} /*  (Non-javadoc)  *  @see  java.lang.runnable#run ()  */@Overridepublic  synchronized void run ()  {try {bufferedwriter.write (msg); Bufferedwriter.flush ();}  catch  (ioexception e)  {e.printstacktrace ();}} Public void send (string msg) {this.msg = msg;new thread (this). Start ();}}

Server-Side Testing

Public class tcpsocketserver {public static void main (String[] args)  { List<sockethandler> serverhandlers = new copyonwritearraylist<sockethandler> () ; Serversocket serversocket = null;try {serversocket = new serversocket (8090, &NBSP;5); while (true) {socket clientsocket = serversocket.accept (); if (clientsocket.isconnected ())  {sockethandler serverhandler = new sockethandler (Clientsocket); ServerHandlers.add ( Serverhandler); Serverhandler.listen (true); Serverhandler.sendmessage ("Host:" +serversocket.getinetaddress (). Gethostaddress () + "\ r \ n");/*while  (True)  {scanner sc = new scanner (System.in); String next = sc.nextline () + "\ r \ n";for  (sockethandler scitem :  Serverhandlers)  {scitem.sendmessage (next);}} */}}} catch  (ioexception e)  {e.printstacktrace ();} Finally{try {for  (sockethandler serverhandler : serverhandlers)  {serverhandler.shutdown ();} Serverhandlers.clear (); Serversocket.close ();}  catch  (ioexception e)  {e.printstacktrace ();}}}

Client Testing

public class Tcpsocketclient {public static void main (string[] args) {Sockethandler ClientHandler = null;try {Socket Clien Tsocket = new Socket ("localhost", 8090), clientsocket.setkeepalive (true); Clientsocket.settcpnodelay (true); if (  Clientsocket.isconnected ()) {ClientHandler = new Sockethandler (clientsocket); Clienthandler.listen (true); while (true) {Scanner sc = new Scanner (system.in); String next = sc.nextline () + "\ r \ n"; if (!clientsocket.isclosed ()) {clienthandler.sendmessage (next);} Else{break;}}}} catch (IOException e) {e.printstacktrace ();} Finally{clienthandler.shutdown ();}}}

Java socket read-write asynchronous detach